mirror of https://github.com/schollz/croc.git
54 lines
1.4 KiB
Go
54 lines
1.4 KiB
Go
package compress
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import (
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"bytes"
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"compress/flate"
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"io"
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log "github.com/schollz/logger"
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)
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// CompressWithOption returns compressed data using the specified level
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func CompressWithOption(src []byte, level int) []byte {
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compressedData := new(bytes.Buffer)
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compress(src, compressedData, level)
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return compressedData.Bytes()
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}
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// Compress returns a compressed byte slice.
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func Compress(src []byte) []byte {
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compressedData := new(bytes.Buffer)
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compress(src, compressedData, -2)
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return compressedData.Bytes()
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}
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// Decompress returns a decompressed byte slice.
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func Decompress(src []byte) []byte {
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compressedData := bytes.NewBuffer(src)
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deCompressedData := new(bytes.Buffer)
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decompress(compressedData, deCompressedData)
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return deCompressedData.Bytes()
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}
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// compress uses flate to compress a byte slice to a corresponding level
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func compress(src []byte, dest io.Writer, level int) {
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compressor, err := flate.NewWriter(dest, level)
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if err != nil {
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log.Debugf("error level data: %v", err)
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return
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}
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if _, err := compressor.Write(src); err != nil {
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log.Debugf("error writing data: %v", err)
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}
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compressor.Close()
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}
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// compress uses flate to decompress an io.Reader
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func decompress(src io.Reader, dest io.Writer) {
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decompressor := flate.NewReader(src)
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if _, err := io.Copy(dest, decompressor); err != nil {
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log.Debugf("error copying data: %v", err)
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}
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decompressor.Close()
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}
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